Analysis of Wake Survey and Boundary Layer Measurements for the R/V ATHENA Represented by Model 5366 in the Anechoic Wind Tunnel
Abstract
This report presents results of wake survey and boundary layer profile measurements for a model representing a twin-screw displacement ship. These measurements were obtained in a wind tunnel using hot wire anemometers. Wake surveys were conducted in the propeller disk and ahead of the propeller plane with and without the propeller operating. Circumferential distributions of the longitudinal, tangential, and radial velocity components at four radial locations and a harmonic analysis of each component are included. The boundary layer profile measurements were obtained at three longitudinal locations in the area of the shafting and struts. A comparison of full-scale, model-scale towing tank, and wind tunnel measurements is presented. Model-scale boundary layer velocity profiles ahead and astern of the propeller plane were smaller than the full-scale profiles. The model wake surveys ahead of the propeller plane showed no significant differences with and without the propeller operating. The data from the wind tunnel wake survey in the propeller plane agreed better with the full-scale data than the towing tank data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1980
- Accession Number
- ADA087069
Entities
People
- David W Taylor
- Douglas S. Jenkins
- Rae B. Hurwitz